Construction design and shrink joint for ships



Deg. 4, 1945. RYDBERG 2,390,330

CONSTRUCTION DESIGN ANO SHRINK JOINT FOR SHIPS Filed April 24, 1944 272d Eydber IN VEN ATTORNEYS BY mywr.

Patented Dec. 4, 1945 OFFICE oONsTnUoT1ON DESIGN AND SHRINK JOINT FOR snrrs Fred A. Rydberg, Seattle, Wash. Application April 24, 1944, Serial No. 532,492

2 Claims.

The invention relates to a shrinking and warp proof joint in sheet metal constructions, and more especially to shell plating in building hips. and the method of joining metal sections thereof. I The primary object of the invention is the provision of a. joint in sheet metal constructions of the character specified, wherein such joint is as near as possible proofed against shrinking and warping, and at the same time expansion and-contraction is relieved from the said joint.

Another object of the invention is the provision of a joint of this character, wherein the breaking open of the same is prevented, in that stresses and strains are absorbed by the plating and not by the joint therebetween, the method for effecting the joint and in the building of metallic walled ships being unique and novel in its entirety.

A further object of the invention is the provision of a joint of this character, which is simple in construction, and in the application of plating to ships, eliminates rolling and pressing operations in the application of the plating, and requires welding in the installation.

With these and other objects in view the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawing, and pointed out in the claims hereunto appended.

In the accompanying drawing:

Figure l is a side elevation of a vessel having the joint structure in accordance with the invention applied.

Figure 2 is an enlarged vertical sectional view thereof.

Figure 3 is a fragmentary sectional view on an enlarged scale of one joint formation.

Figure 4 is a similar view to Figure 3 showing another joint formation.

Figure 5 is a view similar further joint formations.

Similar reference characters indicate corresponding parts throughout the several views in the drawing.

Referring to the drawing in detail A designates generally a vessel hull which may be of any design having metallic sheathing or plating I0, of sections H covering the framing l2 in its build. The vessel hull A is disclosed to illustrate the method of carrying out the invention to Figure 4 showing through expansion and contraction of the metal sections or plates.

The metal sections or plates H are .prefabricated at the meeting areas thereof to present companion outwardly curved formations l4, the raw edges I5 of which are reversely beveled to each other, as at l6, at 45 or degree angles, through side surfacing. These beveled edges [6 are joined with each other by a welding as at [1, it being desirable to have the welded seams l8 created or effected on a bias, while the plates or sections are disposed parallel to each other throughout the side surfacing.

At the keel line of the hull A the sections or plates l9 at their areas 20 adjacent to each other are outwardly curved at 2|, and theraw edges of these are reversely beveled knife edged as at 22, While tack welding 23 is had with the metal keel'formation 24 at opposite reverse bevels of these edges 25, the latter conforming to the lay of the keel 24'.

Thus it should be seen that vertical and horizontal shrinkages, warping strains and stresses are relieved from the joints and the inherent expansion and contraction of the metal will be absorbed by the curvatures at the meeting areas of the sections or plates, thereby relieving the joints from any tearing apart, or separation of the sections or plates, so that the joints are practically, nearly as possible, shrink and warp proof.

Furthermore, in the applying of the sections or plating there is completely eliminated the rolling and pressing operations, and minimum welding is required for the installation thereof.

What is claimed is:

1. A ship having a frame, a sheathing of a plurality of sections welded to said frame, a curved edging formed on each section, a beveled edge formation thereto, a keel joined to the bottom of said frame, said keel being interposed between the curved edging of said sections, and tack welding securing the edges of said sections to opposite side of said keel.

2. The invention as described in claim 1, wherein the sections are disposed on said frame in parallel relationship to each other with the ends thereof welded to the keel on a bias.

FRED A. RYDBERG. 

